Patricia shares her supermodel sister's good looks, but prefers to stay behind the camera. The blonde beauty has dabbled in modelling, but is now Gisele's manager.
The Victoria's Secret angel posted a stunning photo of the pair on Facebook, on their birthday.
"I feel so lucky to be born with my best friend," wrote Gisele. "I love you Pati. Happy birthday !!! Tive muita sorte de ter nascido com minha melhor amiga. Te amo muito Pati. Feliz aniversário ! 🎂 #birthday#bestfriendintheworld #oldpicture #love #twins."